Weathering of rocks are of two types :Physical weathering which is due to physical effects like temperature change, abrasion (grinding action of flowing water and wind) and splitting action due to ice, rain, penetration of plant roots. Physical weathering produces soils like gravel, sand, non plastic silt.

Chemical weathering which is due to chemical actions like oxidation, carbonation, hydration , solution, hydrolysis. Chemical weathering produces soils like clay, plastic silt.Transportation of soils : It is due to Wind – Aeolion soils – Transported and deposited by wind. Water – Alluvial soils – Transported by water and deposited along river bed. Glacier – Glacier Deposit – Transported by glaciers.Gravity – Colluvial soils – Transported and deposited by gravity.